s=0
for i in range(1,100):
    if i%2==1:
        s+=i

print(s)

#################
n=0
for i in range(1,100,2):
    n+=i
print(n)
#################

t=0
j=1
while j<100:
    if j%2==1:
        t+=j
    j+=1

print(t)







